Stitch is an alien experiment created by Jumba Jookiba. Originally programmed to destroy entire cities, his encounter with Lilo would instil in him that there's a place for everyone in the world, and in that the concept of 'Ohana, that no-one gets left behind, or forgotten. He became Lilo's lifelong friend, and later used his powers to help Lilo catch the other of Jumba's experiments and turn them from bad to good.
This section looks lonely. Why not add an askblog here?